Nice article, you also see that in content - creators using the same hooks, transitions etc. It gets tiresome after seeing the same "stop doing X this way/try this one trick/top ten" after a while.
Besides profit motive, there are fundamental and evolutionary reasons for the convergence - humans are naturally attracted to pleasing composition and natural light in AirSpace, have our attention easily manipulated by unconventional titles etc. So companies are just exploiting our penchants and preferences.